/*
 * Copyright &copy; 2010-2011 Rebecca G. Bettencourt / Kreative Software
 * <p>
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * <a href="http://www.mozilla.org/MPL/">http://www.mozilla.org/MPL/</a>
 * <p>
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 * <p>
 * Alternatively, the contents of this file may be used under the terms
 * of the GNU Lesser General Public License (the "LGPL License"), in which
 * case the provisions of LGPL License are applicable instead of those
 * above. If you wish to allow use of your version of this file only
 * under the terms of the LGPL License and not to allow others to use
 * your version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the LGPL License. If you do not delete
 * the provisions above, a recipient may use your version of this file
 * under either the MPL or the LGPL License.
 * @since OpenXION 1.2
 * @author Rebecca G. Bettencourt, Kreative Software
 */

package com.kreative.openxion.util;

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

public class EndlessInputStream extends FilterInputStream {
	private boolean eof;
	
	public EndlessInputStream(InputStream in) {
		super(in);
		eof = false;
	}

	public int read() throws IOException {
		if (eof) return 0;
		int r = in.read();
		if (r < 0) {
			eof = true;
			return 0;
		} else {
			return r;
		}
	}
	
	public int read(byte[] b) throws IOException {
		if (eof) return b.length;
		int r = in.read(b);
		if (r < 0) {
			eof = true;
			return 0;
		} else {
			return r;
		}
	}
	
	public int read(byte[] b, int off, int len) throws IOException {
		if (eof) return len;
		int r = in.read(b, off, len);
		if (r < 0) {
			eof = true;
			return 0;
		} else {
			return r;
		}
	}
	
	public long skip(long n) throws IOException {
		if (eof) return n;
		long r = in.skip(n);
		if (r < 0) {
			eof = true;
			return 0;
		} else {
			return r;
		}
	}
}
